/**
 * Copyright 2013-2020 the original author or authors from the JHipster project.
 *
 * This file is part of the JHipster project, see http://www.jhipster.tech/
 * for more information.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

class JDLOptions {
    constructor() {
        this.options = {};
        this.optionSize = 0;
    }

    addOption(option) {
        if (!option || !option.getType) {
            throw new Error("Can't add nil option.");
        }
        if (option.getType() === 'UNARY') {
            addUnaryOption(this.options, option);
        } else {
            addBinaryOption(this.options, option);
        }
        this.optionSize++;
    }

    getOptions() {
        const options = [];
        Object.values(this.options).forEach(item => {
            if (item.getType && item.getType() === 'UNARY') {
                options.push(item);
                return;
            }
            Object.values(item).forEach(option => options.push(option));
        });
        return options;
    }

    getOptionsForName(optionName) {
        if (!optionName) {
            return [];
        }
        return this.getOptions().filter(option => option.name === optionName);
    }

    has(optionName) {
        if (!optionName) {
            return false;
        }
        return !!this.options[optionName] || this.getOptions().filter(option => option.name === optionName).length !== 0;
    }

    size() {
        return this.optionSize;
    }

    forEach(passedFunction, thisArg) {
        if (!passedFunction) {
            return;
        }
        this.getOptions().forEach(jdlOption => {
            passedFunction.call(thisArg, jdlOption);
        });
    }

    toString(indent = 0) {
        if (this.optionSize === 0) {
            return '';
        }
        const options = this.getOptions();
        const spaceBeforeEachOption = ' '.repeat(indent);
        return options.map(jdlOption => `${spaceBeforeEachOption}${jdlOption.toString()}`).join('\n');
    }
}

function addUnaryOption(options, optionToAdd) {
    const key = optionToAdd.name;
    if (!options[key]) {
        options[key] = optionToAdd;
        return;
    }
    options[key].addEntitiesFromAnotherOption(optionToAdd);
}

function addBinaryOption(options, optionToAdd) {
    const { name, value } = optionToAdd;

    if (!options[name]) {
        options[name] = {
            [value]: optionToAdd,
        };
    } else if (!options[name][value]) {
        options[name][value] = optionToAdd;
    } else {
        options[name][value].addEntitiesFromAnotherOption(optionToAdd);
    }
}

module.exports = JDLOptions;
